## How to Edit Subtitles Online with Subly

Streamlines the process - upload your video and create perfectly timed captions in just a few clicks.

### Step 1  
**Upload Video or Audio**  
Drop your media file into Subly. Have an existing SRT or VTT file? Upload that too — Subly syncs it to your video automatically.

### Step 2  
**Edit Subtitles and Captions**  
Fix text errors, adjust timing by dragging on the timeline, split or merge subtitle blocks. Customize characters per line (CPL), characters per second, font size, color, style, and positioning.

### Step 3  
**Translate (Optional)**  
Need multiple languages? Translate your edited subtitles to 100+ languages without starting over.

### Step 4  
**Export**  
Download as MP4 or MOV with burned-in captions. Or export subtitle files as SRT, VTT, TTML, or XML. Transcript-only? Export as TXT or DOCX.

## What is a Subtitle Editor?
A subtitle editor lets you modify subtitle and caption files — fix errors, adjust timing, change styling, sync text to video.

You need a subtitle editor when:
- Auto-generated captions have errors that need correcting
- Timing is off and subtitles don't match dialogue
- You're working with an existing SRT file that needs updates
- Captions need restyling for brand consistency or platform requirements
- You want to split, merge, or reformat subtitle blocks

Traditional subtitle editing means downloading software, learning complex interfaces, manually matching timestamps. Subly's online subtitle editor does it all in-browser — upload, edit, export.

## Compliant & Professional-Grade
Ensure your subtitles meet EAA, ADA Title II, ACA, and AODA standards, while aligning with WCAG 2.2 AA/AAA guidelines.

## Edit Text & Timing
Fix transcription errors, correct spelling, adjust timestamps. Drag subtitle blocks on the timeline to sync perfectly with audio.

## Style Your Captions
Customize font, size, color, background, positioning. Match your brand guidelines or platform requirements.

## Split & Merge Subtitles
Break long subtitle blocks into readable chunks. Merge short fragments. Control characters per line and reading speed.

## Create Video Clips
Use Snippets to clip sections of your video with subtitles intact. Create social cuts without re-editing captions.

## Add Text Overlays
Add titles, lower thirds, or text callouts beyond just subtitles. Full text-on-video control.

## Resize for Social
One-click aspect ratio presets for YouTube (16:9), Instagram/TikTok (9:16), Facebook (1:1), and more. Subtitles reposition automatically.

## Built for Scale, Speed, and Simplicity
Subly’s enterprise-grade platform automates audio description across entire video libraries. Process thousands of files faster, more accurately, and up to seven times more affordably than manual production.

## Who Needs to Edit Subtitles Online?
Whether you want to cut the manual work or make sure every video is compliant before it becomes an issue - Subly does the heavy lifting.

### Marketing Teams
- Fix auto-caption errors before publishing
- Brand-consistent subtitle styling
- Social media reformatting

### Education
- Correct lecture transcriptions
- Adjust timing for complex content
- Multi-format exports for LMS

### Corporate L&D
- Edit training video captions
- Ensure accuracy for compliance content
- Batch styling across video libraries

### e-Commerce
- Polish product video subtitles
- Localize existing content
- Platform-specific formatting

### Media & Entertainment
- Professional subtitle timing
- Broadcast-standard formatting
- Multi-language versioning

### Government & Public Sector
- Accuracy review for public content
- Section 508 compliant formatting
- Accessible document exports

## Seamless Accessibility
Subly covers every accessibility requirement for video content:

### Captions & Subtitles
Checks if captions are in the video, then generates open and closed captions in 100+ languages.

### Transcriptions
Automatically generates transcripts in 100+ languages. For descriptive transcripts, request our expert team to help as an alternative format.

### Audio Descriptions
Our expert team creates standard and extended Audio Description for videos to support visually impaired viewers and listeners.

### Localisation & Translation
Translate into 100+ languages and use the editor to clearly see the original and translation. Work on multiple translations at once.

### Colour Contrast
AI checks WCAG compliance for text in videos and captions, flags issues, and allows colour adjustments.

## FAQ
### Can I edit an SRT file online without downloading software?
Yes. Upload your SRT file to Subly and edit directly in your browser. Adjust text, timing, and styling, then export the updated file. No software installation needed.

### What subtitle formats does Subly support?
Import and export SRT, VTT, TTML, and XML. Videos export as MP4 or MOV with burned-in captions. Text transcripts export as TXT or DOCX.

### What file formats can I export?
Yes. Drag subtitle blocks on the timeline to adjust timing visually. Or edit timestamps directly in the subtitle editor. Preview playback to check sync before exporting.

### How do I fix auto-generated caption errors?
Upload your video with existing captions (or generate new ones with Subly's AI), then edit text directly in the subtitle editor. Click any subtitle block to modify. Changes save automatically.

### Can I change subtitle styling and fonts?
Yes. Customize font family, size, color, background color, opacity, and positioning. Apply consistent styling across your entire video or adjust individual subtitle blocks.

### Does editing subtitles affect my original video file?
No. Your original file stays unchanged. Subly creates a new output with your edits — either a new video file with burned-in captions or updated subtitle files for use elsewhere.